HP Brocade 8/12c Fabric OS Troubleshooting and Diagnostics Guide v6.4.0 (53-10 - Page 123

Hexadecimal, Example of hexadecimal triplet conversion

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Hexadecimal Appendix B Hexadecimal, or simply hex, is a numeral system with a base of 16, usually written using unique symbols 0-9 and A-F, or a-f. Its primary purpose is to represent the binary code that computers interpret and represent in a format easier for humans to read. It acts as a form of shorthand, in which one hexadecimal digit stands in place of four binary bits. For example, the decimal numeral 79, whose binary representation is 01001111, is 4F (or 4f) in hexadecimal (4 = 0100, F = 1111). Hexadecimal numbers can have either an 0x prefix or an h suffix. For example, 0xFFFFFA is the same address as FFFFFAh. This type of address is called a hex triplet. Fibre Channel uses hexadecimal notation in hex triplets to specify well-known addresses and port IDs. Example of hexadecimal triplet conversion Notice the PID in the nsshow output is in hexadecimal. Switch:admin> nsshow { Type Pid COS PortName NodeName TTL(sec) N 610600; 2,3;10:00:00:00:c9:29:b3:84;20:00:00:00:c9:29:b3:84; na FC4s: FCP NodeSymb: [36] "Emulex LP9002 FV3.90A7 DV5-5.10A10 " Fabric Port Name: 20:08:00:05:1e:01:23:e0 Permanent Port Name: 10:00:00:00:c9:29:b3:84 Port Index: 6 Share Area: No Device Shared in Other AD: No Redirect: No The Local Name Server has 1 entry } 1. Separate the triplets: 61 06 00 2. Convert each hexadecimal value to a decimal representation: 61 = Domain ID = 97 06 = Area (port number) = 06 00 = Port (AL_PA) = 0 (not used in this instance, but is used in loop, NPIV, and Access Gateway devices) Result: hexadecimal triplet 610600 = decimal triplet 97,06,00 Fabric OS Troubleshooting and Diagnostics Guide 109 53-1001769-01

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Fabric OS Troubleshooting and Diagnostics Guide
109
53-1001769-01
Appendix
B
Hexadecimal
Hexadecimal, or simply hex, is a numeral system with a base of 16, usually written using unique
symbols 0–9 and A–F, or a–f. Its primary purpose is to represent the binary code that computers
interpret and represent in a format easier for humans to read. It acts as a form of shorthand, in
which one hexadecimal digit stands in place of four binary bits. For example, the decimal numeral
79, whose binary representation is 01001111, is 4F (or 4f) in hexadecimal (4 = 0100, F = 1111).
Hexadecimal numbers can have either an
0x
prefix or an
h
suffix. For example, 0xFFFFFA is the
same address as FFFFFA
h.
This type of address is called a hex triplet. Fibre Channel uses
hexadecimal notation in hex triplets to specify well-known addresses and port IDs.
Example of hexadecimal triplet conversion
Notice the PID in the nsshow output is in hexadecimal.
Switch:admin> nsshow
{
Type Pid
COS
PortName
NodeName
TTL(sec)
N
610600
;
2,3;10:00:00:00:c9:29:b3:84;20:00:00:00:c9:29:b3:84; na
FC4s: FCP
NodeSymb: [36] "Emulex LP9002 FV3.90A7
DV5-5.10A10 "
Fabric Port Name: 20:08:00:05:1e:01:23:e0
Permanent Port Name: 10:00:00:00:c9:29:b3:84
Port Index: 6
Share Area: No
Device Shared in Other AD: No
Redirect: No
The Local Name Server has 1 entry }
1.
Separate the triplets: 61 06 00
2.
Convert each hexadecimal value to a decimal representation:
61 = Domain ID = 97
06 = Area (port number) = 06
00 = Port (AL_PA) = 0 (not used in this instance, but is used in loop, NPIV, and Access Gateway
devices)
Result: hexadecimal triplet 610600 = decimal triplet 97,06,00